Leases (Details 2) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Mar. 01, 2014
Net book values of assets under capital leases and sale-leasebacks
Accumulated depreciation	$ (123,581)	$ (113,536)
Net value	52,923	62,859
Obligations under financing leases	87,253	102,671
Sale-leaseback obligations	4,740	4,740
Less current obligation	(30,841)	(32,240)
Long-term lease finance obligations	61,152	75,171
Minimum payments for Lease Financing Obligations
2016	37,592
2017	19,330
2018	13,496
2019	12,370
2020	8,241
Later years	27,507
Total minimum lease payments	118,536
Amount representing interest	(26,543)
Present value of minimum lease payments	91,993
Minimum payments for Operating Leases
2016	1,017,273
2017	980,733
2018	904,510
2019	813,533
2020	686,302
Later years	3,395,003
Total minimum lease payments	7,797,354
Land
Net book values of assets under capital leases and sale-leasebacks
Gross value	5,063	5,063
Buildings
Net book values of assets under capital leases and sale-leasebacks
Gross value	133,177	135,581
Leasehold improvements
Net book values of assets under capital leases and sale-leasebacks
Gross value	1,330	1,446
Equipment
Net book values of assets under capital leases and sale-leasebacks
Gross value	$ 36,934	$ 34,305